Techno-economic and environmental impact analysis of tuyere injection of hot reducing gas from low-rank coal gasification in blast furnace

被引：22

作者：

Kim, Jinsu ^{[1
]}

Kim, Jungil ^{[2
]}

Oh, Hyunmin ^{[1
]}

Lee, Seokyoung ^{[1
]}

Lee, In-Beum ^{[3
]}

Yoon, Young-Seek ^{[4
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Chem Engn, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea

[2] POSCO, 6262 Donghaean Ro, Pohang 37877, Gyeongbuk, South Korea

[3] Ulsan Natl Inst Sci & Technol UNIST, Sch Energy & Chem Engn, Ulsan 44919, South Korea

[4] Pohang Univ Sci & Technol, Grad Inst Ferrous & Energy Mat Technol, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea

来源：

ENERGY | 2022年 / 241卷

关键词：

Hot reducing gas; Gaseous fuel injection; Blast furnace; Low-rank coal utilization; Techno-economic analysis; CO2 emission reduction; NATURAL-GAS; CO2; CAPTURE; IRONMAKING; PERFORMANCE; SIMULATION; BIOMASS; OPTIMIZATION; CONVERSION; OPERATION; RACEWAY;

D O I：

10.1016/j.energy.2021.122908

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Our goal is to find a strategy to reduce coke use during operation of a blast furnace (BF). This study focuses on the techno-economic and environmental impact analysis of tuyere injection of hot reducing gas (HRG) from low-rank coal (LRC) gasification in the BF. LRC gasification by entrained-flow gasifier is introduced to make gaseous fuel, and the cleaning process of the raw syngas is implemented using Aspen Plus V10. The effects of HRG injection are evaluated using a BF model derived from the Rist operating diagram. Integrated results from raw fuel to the BF were analyzed considering economic, energy, and environmental aspects. By injecting rich syngas (>95 vol %) into the BF at 1150 K, coke replacement ratio is estimated to be 0.354 kg/Nm(3) without adverse impact on the BF. The most sensitive economic factor is coke price. The energy efficiency of raw syngas cleaning process, relative energy intensity of LRC, gas utilization ratio are 57.5%, 90.6%, and 50.0% respectively. Utilization of HRG can reduce CO2 emission by 21.88 kt(CO2)/yr compared to the reference BF operation. (C) 2021 Published by Elsevier Ltd.

引用

页数：11

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